Game Development Reference
In-Depth Information
If you wanted to add a black background to the scene, you would select the
fifth
overloaded constructor method, using a
Color.BLACK
constant from the
Color
class
(this is a
Paint
object, because Color is a Paint subclass) as your fill data (in this case,
a fill Color). You would do this by using the following Scene() object constructor
method call:
Scene scene =
new
Scene(root, 300, 250,
Color.BLACK
);
Note that the
root
object is a
Parent
subclass, called the
StackPane
class, created
using the
StackPane()
constructor method (two lines above the Scene() constructor
method call) by using the following line of Java code:
StackPane root =
new
StackPane(); // StackPane
subclassed from Parent, so Parent root satisfied
As you can see, any class can be used in the constructor that is a subclass of the ob-
ject (class) type that is declared (required) for that constructor parameter position
(data). You are able to use Color and StackPane objects in your parameter list because
they have superclass origins from the Paint and Parent classes, respectively.
In case you are wondering, the
Boolean depthBuffer
parameter is used for
3D
scene components. Because these scene components are 3D and have depth (a z com-
ponent, in addition to 2D x
and
y components), you will need to include this parameter,
and set it to a value of
true
, if you are creating 3D scenes or combining 2D and 3D
scene components. Finally, the
SceneAntialiasing
object (and class) that is passed in
the parameter list for the fourth constructor method provides
real-time smoothing
for
3D scene components.
JavaFXSceneGraph:OrganizingScenes,UsingParent
Nodes
A scene graph, which is not unique to JavaFX and which can be seen in quite a few
new media content creation software packages, is a
data structure
that resembles an
upside-down tree, with the
root node
at the top and
branch nodes
and
leaf nodes
coming off the root node. The first time I saw a scene graph approach to design was
when I was 3D modeling using a software package on the Amiga called Real 3D from
Realsoft Oy. This approach has been copied by many 3D, digital video, and digital
imaging software packages since then and now is a part of how JavaFX organizes con-
